Is the father of lies the most deceitful?
Since Satan is the father of lies (John 8:44), one would think that he is the most deceitful on all the earth. Is that what the Bible says?
The heart is deceitful above all things, and desperately wicked: who can know it? Jeremiah 17:9
What is more deceitful than Satan? According to scripture, your heart is. That should give you pause for thought.